Curtain rod clamp



FIG. 1 is a front elevational view and rear elevational view of a curtain rod clamp showing my new design;

FIG. 2 is a side elevational view of both sides;

FIG. 3 is a top plan view;

FIG. 4 is a bottom view thereof. 

The ornamental design for a curtain rod clamp, substantially as shown and described. 